two multivariate calibration methods are compared for the simultaneous chromatographic determination and separation of sulfamethoxazole (smx) and phthalazine (phz) by high performance liquid chromatography (hplc). multivariate calibration techniques such as classical least squares (cls) and inverse least squares (ils) were introduced into hplc to determine the quantification by using uv detecto...

In this theoretical work, we present for the first time voltammetric results of a surface multistep electron transfer mechanism that is associated with a preceding chemical reaction that is linked to the first electron transfer step. The mathematical model of this so-called “surface CEE mechanism” is solved under conditions of square-wave voltammetry. We present relevant set of results portrayi...

Gas chromatographic prediction of poly-aromatics retention indices in a petroleum crude oil based on matching with reported retention indices on the same stationary phases under a similar temperature program was studied. The bases of the matching with reported retention indices for peaks identifications were mentioned. Deconvulated software was used to separate the overlapped poly-aromatic peaks.